Cyclopentasiloxane
Cyclopentasiloxane
Also known as: D5 · Decamethylcyclopentasiloxane
EmollientSolventSmoothing
“A volatile silicone that gives serums a silky, fast-evaporating feel.”
What it does
Cyclopentasiloxane (D5) is a volatile cyclic silicone that evaporates quickly from skin, leaving a silky, non-greasy finish. It is widely used as a carrier for actives and as a texture agent in serums and primers. The EU has restricted it in wash-off products due to environmental concerns, but leave-on use remains permitted.
Benefits
- Ultra-light, fast-evaporating feel
- Excellent carrier for oil-soluble actives
- Provides a silky, skin-smoothing texture
How to layer
☀️ Morning routine
Cleanser
Toner
Serum
Moisturiser
SPF
🌙 Evening routine
Cleanser
Toner
Serum
Moisturiser
Face Oil
As the last step in your routine
Good for
All skinOily skinCombination skin
Works well with
Heads up
- ⚠EU restricted in rinse-off products (environmental persistence)
- ⚠Some concerns about bioaccumulation in aquatic organisms
How to use
A background texture ingredient. No special application needed.
Typical concentration: 5–40% in serums and primers